<public-tips></public-tips>

    app.module('demoApp', []).controller('demoController', ['$rootScope', '$scope', function($rootScope, $scope) {
        $rootScope.$broadcast('to-directive', {isShow: true, content: 'hello-directive'});
    })

    app.directive('public-tips', function ($rootScope) {
        return {
            restrict: 'EA',
            template: '<p class="public-tips" ng-show="msg.isShow">{{::msg.content}}</p>',
            link: function (scope, ele, attr) {
                scope.$on('to-directive', function (event, data) {
                    scope.msg = data;
                    console.log(data);
                });
            }
        }
    });

我在$rootScope上分发的事件，但是在directive里面却接受不到？